Sally Pearson

Her silver medal in the 100-m hurdles in Beijing was called “accidental” after favorite and race leader Lolo Jones clipped a late hurdle. But now Sally Pearson is the favorite. The current world champion in the 100-m hurdles, Pearson, 25, was named Female Athlete of the Year in 2011 and has won every race she’s competed in this year. If Pearson wins the silver in London, it really will be an accident.